condition.c revision 23554e8479a5995b1c7d775462145e426d637330
/*
* Copyright (C) 2004, 2005, 2007, 2012 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1998-2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: condition.c,v 1.36 2007/06/19 23:47:18 tbox Exp $ */
/*! \file */
#include <config.h>
#include <errno.h>
#include <isc/condition.h>
#include <isc/msgs.h>
#include <isc/strerror.h>
#include <isc/string.h>
#include <isc/time.h>
#include <isc/util.h>
isc_result_t
isc_condition_waituntil(isc_condition_t *c, isc_mutex_t *m, isc_time_t *t) {
int presult;
isc_result_t result;
struct timespec ts;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(c != NULL && m != NULL && t != NULL);
/*
* POSIX defines a timespec's tv_sec as time_t.
*/
result = isc_time_secondsastimet(t, &ts.tv_sec);
/*
* If we have a range error ts.tv_sec is most probably a signed
* 32 bit value. Set ts.tv_sec to INT_MAX. This is a kludge.
*/
if (result == ISC_R_RANGE)
ts.tv_sec = INT_MAX;
else if (result != ISC_R_SUCCESS)
return (result);
/*!
* POSIX defines a timespec's tv_nsec as long. isc_time_nanoseconds
* ensures its return value is < 1 billion, which will fit in a long.
*/
ts.tv_nsec = (long)isc_time_nanoseconds(t);
do {
#if ISC_MUTEX_PROFILE
presult = pthread_cond_timedwait(c, &m->mutex, &ts);
#else
presult = pthread_cond_timedwait(c, m, &ts);
#endif
if (presult == 0)
return (ISC_R_SUCCESS);
if (presult == ETIMEDOUT)
return (ISC_R_TIMEDOUT);
} while (presult == EINTR);
isc__strerror(presult, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"pthread_cond_timedwait() %s %s",
isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
ISC_MSG_RETURNED, "returned"),
strbuf);
return (ISC_R_UNEXPECTED);
}